Photoinduced Oxidation Catalysis by Au25‐xAgx(SR)18 Nanoclusters

Chong, Hanbao; Gao, Gui-Qi; Chai, Jinsong; Yang, Sha; Rao, Bo; Li, Guang; Zhu, Manzhou

doi:10.1002/cnma.201700336

Cited by 12 publications

(5 citation statements)

References 44 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, with Ag 25 , Au 25 – , and Au 25 0 , although the conversion was 100%, 80.3%, and 82.1%, respectively, the corresponding selectivity was only 29.1%, 73.6%, and 71.9%. As demonstrated previously, the photogeneration of singlet oxygen from Au 25 – is via direct photosensitization under visible and near-IR irradiation, and 1 O 2 can oxidize benzylamine, followed by condensation of benzylaldehyde and amine to generate imine and water …”

Section: Photocatalytic Reactionsmentioning

confidence: 62%

“…− (with no support) in the photocatalytic transformation of benzylamine to produce N-benzylidenebenzylamine (imine) under 420 nm visible light. 428 Interestingly, the alloy Au 25−x Ag x − nanocluster displayed both 100% conversion and 100% selectivity, which was attributed to the synergic effect of the alloy cluster. In contrast, with Ag 25 , Au 25 − , and Au 25 0 , although the conversion was 100%, 80.3%, and 82.1%, respectively, the corresponding selectivity was only 29.1%, 73.6%, and 71.9%.…”

Section: Photocatalytic Organic Reactionsmentioning

confidence: 99%

“…Along with the examples presented above, Zhu et al investigated the catalytic activity of Au 25 (SC 2 H 4 Ph) 18 –/0 , Ag 25 (SPhMe 2 ) 18 , and Au 25– x Ag x (SC 2 H 4 Ph) 18 – (with no support) in the photocatalytic transformation of benzylamine to produce N -benzylidenebenzylamine (imine) under 420 nm visible light . Interestingly, the alloy Au 25– x Ag x – nanocluster displayed both 100% conversion and 100% selectivity, which was attributed to the synergic effect of the alloy cluster.…”

Section: Photocatalytic Reactionsmentioning

confidence: 99%

“…As demonstrated previously, the photogeneration of singlet oxygen from Au 25 − is via direct photosensitization under visible and near-IR irradiation, 177 and 1 O 2 can oxidize benzylamine, followed by condensation of benzylaldehyde and amine to generate imine and water. 428…”

Section: Photocatalytic Organic Reactionsmentioning

confidence: 99%

See 3 more Smart Citations

Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

et al. 2020

View full text Add to dashboard Cite

Heterogeneous catalysis involves solid-state catalysts, among which metal nanoparticles occupy an important position. Unfortunately, no two nanoparticles from conventional synthesis are the same at the atomic level, though such regular nanoparticles can be highly uniform at the nanometer level (e.g., size distribution ∼5%). In the long pursuit of well-defined nanocatalysts, a recent success is the synthesis of atomically precise metal nanoclusters protected by ligands in the size range from tens to hundreds of metal atoms (equivalently 1−3 nm in core diameter). More importantly, such nanoclusters have been crystallographically characterized, just like the protein structures in enzyme catalysis. Such atomically precise metal nanoclusters merge the features of well-defined homogeneous catalysts (e.g., ligand-protected metal centers) and enzymes (e.g., protein-encapsulated metal clusters of a few atoms bridged by ligands). The well-defined nanoclusters with their total structures available constitute a new class of model catalysts and hold great promise in fundamental catalysis research, including the atomically precise size dependent activity, control of catalytic selectivity by metal structure and surface ligands, structure−property relationships at the atomic-level, insights into molecular activation and catalytic mechanisms, and the identification of active sites on nanocatalysts. This Review summarizes the progress in the utilization of atomically precise metal nanoclusters for catalysis. These nanocluster-based model catalysts have enabled heterogeneous catalysis research at the single-atom and single-electron levels. Future efforts are expected to achieve more exciting progress in fundamental understanding of the catalytic mechanisms, the tailoring of active sites at the atomic level, and the design of new catalysts with high selectivity and activity under mild conditions.

show abstract

Section: Photocatalytic Reactionsmentioning

confidence: 62%

Section: Photocatalytic Organic Reactionsmentioning

confidence: 99%

Section: Photocatalytic Reactionsmentioning

confidence: 99%

Section: Photocatalytic Organic Reactionsmentioning

confidence: 99%

See 2 more Smart Citations

Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In general, the heterogeneous photocatalysts consisted of two functional components: the light‐absorbing center and the catalytically active center. Semiconductor, plasmonic metallic structure or upconversion material may serve as a light‐absorbing center, while the active center can be defect structure, non‐metal or transition metal . Although heterogeneous photocatalysts have been successfully applied in organic synthesis, the current research results have not reached the unified understanding towards the fundamental catalytic processes.…”

Section: Introductionmentioning

confidence: 99%

Boosting Photocatalytic Activity in Cross‐Coupling Reactions by Constructing Pd‐Oxide Heterostructures

et al. 2020

ChemNanoMat

View full text Add to dashboard Cite

The design of heterogeneous photocatalysts for organic synthesis has attracted great attention for achieving enhanced catalytic performance under light illumination. However, the effects of photocatalytic processes on organic reactions are quite complicated. In this work, we construct a series of Pd‐oxide heterostructures and then evaluate their catalytic performances on cross‐coupling reactions. The investigation results reveal that the conduction type of the oxide supports critically influences the catalytic efficiency via charge density control of metallic sites. In general, an n‐type semiconductor enhances the catalytic performance while a p‐type reduces the catalytic activity in the presence of suitable illumination conditions. Further investigation on the Pd tetrahedron‐TiO2 nanosheet hybrid structure reveals that Heck reactions take place via a radical intermediate mechanism in the presence of light, leading to a significant increase in the catalytic performance.

show abstract

Au clusters-based visible light photocatalysis

Tan

Zhang

et al. 2021

Res Chem Intermed

View full text Add to dashboard Cite

Photoinduced Oxidation Catalysis by Au_25‐xAg_x(SR)₁₈ Nanoclusters

Cited by 12 publications

References 44 publications

Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

Boosting Photocatalytic Activity in Cross‐Coupling Reactions by Constructing Pd‐Oxide Heterostructures

Au clusters-based visible light photocatalysis

Contact Info

Product

Resources

About